Horizontal Directional Drilling for Non-Traditional Applications
Horizontal directional drilling for non-traditional applications has its roots starting in the 1930’s oil field technology. In the 1970’s, the “river crossing” or HDD technology started in the central valley of California. The first documented use of the technology for environmental applications was in 1987 in the State of Washington. Since that time HDD has been utilized for a wide variety of uses outside the utility/pipeline industries. Nearly all environmental remediation remedies can be applied using HDD technology. Geotechnical applications include dewatering, slope stability and soil sampling. Successful uses of HDD for non-traditional activities requires proper engineering design along with an understanding of subsurface geologic conditions.
Horizontal wells have now been utilized for coal combustion products (CCP) remediation activities. HDD wells have been completed in a dry stacked basin to dewater ash products and under traditional impoundments to serve as groundwater containment and control.
This presentation will provide a brief overview of the HDD well installation technology along with details of two projects where horizontal wells were utilized at ash basin sites.